That Time I Got Reincarnated as a Slime: Trinity in Tempest manga volume 9 is based on the work by Fuse and features story and art by Tae Tono with additional illustrations by Mitz Vah.

With a concept and story by Fuse, the creator of That Time I Got Reincarnated as a Slime, Trinity in Tempest is the grand tour of Rimiru's world that fans have always wanted. Through the eyes of three cute little monsters, one from the fox clan, one from the dragon clan, and one from the winged clan, readers will meet the residents of the utopia in Jura Forest, and get a peek at how they live their lives. The little group's leader, Phos, is a fox girl from the Beast Kingdom of Eurazania. But this isn't just a pleasure trip for her… she's visiting Tempest on secret orders from Lord Carrion. What would a demon lord want with Rimiru's monster paradise?